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Sean Croft avatar

Android - App soll Aufgaben im Sekundentakt ausführen

Gefragt el 23 de Februar, 2012
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Ich versuche, meine Countdown-App zu erhalten, um seine Funktion der Aktualisierung meiner aktuellen Zeit und Datum TextView und Feuer aus seine MyOnItemSelectedListener jede Sekunde, so dass die App dynamisch statt nur, wenn onCreate initiiert wird herunterzählt. Wenn es eine effizientere Methode als schnell abfeuern MyOnItemSelectedListener würde ich die Kritik zu schätzen wissen.

public class TheCount extends Activity {
TextView description=null;
TextView dates=null;
TextView times=null;
TextView output=null;
TextView cDateDisplay=null;
TextView cTimeDisplay=null;
private int mYear;
private int mMonth;
private int mDay;
private int mHour;
private int mMinute;
private int mSecond;
CountdownHelper helper=null;
String countdownId=null;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.thecount);
    helper=new CountdownHelper(this);
    cTimeDisplay = (TextView)findViewById(R.id.lblCurTime);
    cDateDisplay = (TextView)findViewById(R.id.lblCurDate);

    final Calendar c = Calendar.getInstance();
    mYear = c.get(Calendar.YEAR);
    mMonth = c.get(Calendar.MONTH);
    mDay = c.get(Calendar.DAY_OF_MONTH);
    mHour = c.get(Calendar.HOUR_OF_DAY);
    mMinute = c.get(Calendar.MINUTE);
    mSecond = c.get(Calendar.SECOND);

    Spinner spinner = (Spinner) findViewById(R.id.spinner1);
    ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(
            this, R.array.countoptions, android.R.layout.simple_spinner_item);
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    spinner.setAdapter(adapter);

    description =(TextView)findViewById(R.id.lblDescriptFed);
    dates =(TextView)findViewById(R.id.lblDateFed);
    times =(TextView)findViewById(R.id.lblTimeFed);
    output =(TextView)findViewById(R.id.lblOutput);

    countdownId=getIntent().getStringExtra(MainActivity.ID_EXTRA);
    if (countdownId!=null) {
        load();
    }

    spinner.setOnItemSelectedListener(new MyOnItemSelectedListener());

    updateDisplay();

}

private void updateDisplay() {
    Timer timer = new Timer();
    timer.schedule(new TimerTask() {
//@Override
public void run() {
    updatedDisplay();
    }
},0,1000);//Update text every second

}

public class MyOnItemSelectedListener implements OnItemSelectedListener {
    public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) {

        if (parent.getItemAtPosition(pos).toString().equals("Normal")){
            Toast.makeText(parent.getContext(), "Countdown format is " +
                  parent.getItemAtPosition(pos).toString(), Toast.LENGTH_LONG).show();
            convertTime();
        } else if (parent.getItemAtPosition(pos).toString().equals("by Days")){
            Toast.makeText(parent.getContext(), "Countdown format " +
                      parent.getItemAtPosition(pos).toString(), Toast.LENGTH_LONG).show();
                convertDays();
        } else if (parent.getItemAtPosition(pos).toString().equals("by Hours")){
            Toast.makeText(parent.getContext(), "Countdown format " +
                      parent.getItemAtPosition(pos).toString(), Toast.LENGTH_LONG).show();
                convertHours();
        } else if (parent.getItemAtPosition(pos).toString().equals("by Minutes")){
            Toast.makeText(parent.getContext(), "Countdown format " +
                      parent.getItemAtPosition(pos).toString(), Toast.LENGTH_LONG).show();
                convertMinutes();
        } else if (parent.getItemAtPosition(pos).toString().equals("by Seconds")){
            Toast.makeText(parent.getContext(), "Countdown format " +
                      parent.getItemAtPosition(pos).toString(), Toast.LENGTH_LONG).show();
                convertSeconds();
        }

    }
    public void onNothingSelected(AdapterView parent) {
      // Do nothing.
    }
}

private void convertTime() {
    String dtCountdown = dates.getText().toString() + " " + times.getText().toString();
    String dtCurrent = cDateDisplay.getText().toString() + " " + cTimeDisplay.getText().toString();
    SimpleDateFormat  format = new SimpleDateFormat("dd/MM/yyyy hh:mm:ss");  
    try {  
        Date date = format.parse(dtCountdown);
        Date dateCur = format.parse(dtCurrent);
        long diff = dateCur.getTime() - date.getTime();

        int timeInSeconds = (int) (diff / 1000);
        int days, hours, minutes, seconds;
        days = timeInSeconds / 86400;
        timeInSeconds = timeInSeconds - (days * 86400);
        hours = timeInSeconds / 3600;
        timeInSeconds = timeInSeconds - (hours * 3600);
        minutes = timeInSeconds / 60;
        timeInSeconds = timeInSeconds - (minutes * 60);
        seconds = timeInSeconds;

        System.out.println(date); 
        if(dateCur.compareTo(date)>0){
            output.setText(String.valueOf(days) + " days " + String.valueOf(hours) +
                    " hours \n" + String.valueOf(minutes) + " minutes " + String.valueOf(seconds) + " seconds ago");
        } else {
            output.setText(String.valueOf(Math.abs(days)) + " days " + String.valueOf(Math.abs(hours)) +
                    " hours \n" + String.valueOf(Math.abs(minutes)) + " minutes " + String.valueOf(Math.abs(seconds)) + " seconds till");
        }

    } catch (ParseException e) {  
        // TODO Auto-generated catch block  
        e.printStackTrace();  
    }
}

private void convertDays() {
    String dtCountdown = dates.getText().toString() + " " + times.getText().toString();
    String dtCurrent = cDateDisplay.getText().toString() + " " + cTimeDisplay.getText().toString();
    SimpleDateFormat  format = new SimpleDateFormat("dd/MM/yyyy hh:mm");  
    try {  
        Date date = format.parse(dtCountdown);
        Date dateCur = format.parse(dtCurrent);
        long diff = dateCur.getTime() - date.getTime();

        int timeInSeconds = (int) (diff / 1000);
        int days;
        days = timeInSeconds / 86400;

        System.out.println(date); 
        if(dateCur.compareTo(date)>0){
            output.setText(String.valueOf(days) + " days ago");
        } else {
            output.setText(String.valueOf(Math.abs(days)) + " days till");
        }

    } catch (ParseException e) {  
        // TODO Auto-generated catch block  
        e.printStackTrace();  
    }
}

private void convertHours() {
    String dtCountdown = dates.getText().toString() + " " + times.getText().toString();
    String dtCurrent = cDateDisplay.getText().toString() + " " + cTimeDisplay.getText().toString();
    SimpleDateFormat  format = new SimpleDateFormat("dd/MM/yyyy hh:mm");  
    try {  
        Date date = format.parse(dtCountdown);
        Date dateCur = format.parse(dtCurrent);
        long diff = dateCur.getTime() - date.getTime();

        int timeInSeconds = (int) (diff / 1000);
        int hours;

        hours = timeInSeconds / 3600;

        System.out.println(date); 
        if(dateCur.compareTo(date)>0){
            output.setText(String.valueOf(hours) + " hours ago");
        } else {
            output.setText(String.valueOf(Math.abs(hours)) + " hours till");
        }

    } catch (ParseException e) {  
        // TODO Auto-generated catch block  
        e.printStackTrace();  
    }
}

private void convertMinutes() {
    String dtCountdown = dates.getText().toString() + " " + times.getText().toString();
    String dtCurrent = cDateDisplay.getText().toString() + " " + cTimeDisplay.getText().toString();
    SimpleDateFormat  format = new SimpleDateFormat("dd/MM/yyyy hh:mm");  
    try {  
        Date date = format.parse(dtCountdown);
        Date dateCur = format.parse(dtCurrent);
        long diff = dateCur.getTime() - date.getTime();

        int timeInSeconds = (int) (diff / 1000);
        int minutes;

        minutes = timeInSeconds / 60;

        System.out.println(date); 
        if(dateCur.compareTo(date)>0){
            output.setText(String.valueOf(minutes) + " minutes ago");
        } else {
            output.setText(String.valueOf(Math.abs(minutes)) + " minutes till");
        }

    } catch (ParseException e) {  
        // TODO Auto-generated catch block  
        e.printStackTrace();  
    }
}

private void convertSeconds() {
    String dtCountdown = dates.getText().toString() + " " + times.getText().toString();
    String dtCurrent = cDateDisplay.getText().toString() + " " + cTimeDisplay.getText().toString();
    SimpleDateFormat  format = new SimpleDateFormat("dd/MM/yyyy hh:mm");  
    try {  
        Date date = format.parse(dtCountdown);
        Date dateCur = format.parse(dtCurrent);
        long diff = dateCur.getTime() - date.getTime();

        int timeInSeconds = (int) (diff / 1000);
        int seconds;
        seconds = timeInSeconds;

        System.out.println(date); 
        if(dateCur.compareTo(date)>0){
            output.setText(String.valueOf(seconds) + " seconds ago");
        } else {
            output.setText(String.valueOf(Math.abs(seconds)) + " seconds till");
        }

    } catch (ParseException e) {  
        // TODO Auto-generated catch block  
        e.printStackTrace();  
    }
}

private void updatedDisplay() {
    TextView cDateDisplay=null;
    TextView cTimeDisplay=null;
    cTimeDisplay = (TextView)findViewById(R.id.lblCurTime);
    cDateDisplay = (TextView)findViewById(R.id.lblCurDate);
    cDateDisplay.setText(
        new StringBuilder()
                // Month is 0 based so add 1
                .append(mDay).append("/")
                .append(mMonth + 1).append("/")
                .append(mYear).append(" "));
    cTimeDisplay.setText(
            new StringBuilder()
                    .append(pad(mHour)).append(":")
                    .append(pad(mMinute)).append(":").append(pad(mSecond)));
}

private static String pad(int c) {
    if (c >= 10)
        return String.valueOf(c);
    else
        return "0" + String.valueOf(c);
}  

private void load() {
    Cursor c=helper.getById(countdownId);

    c.moveToFirst();    
    description.setText(helper.getDescription(c));
    dates.setText(helper.getDate(c));
    times.setText(helper.getTime(c) + ":00");

    c.close();
}

@Override
public void onDestroy() {
    super.onDestroy();

    helper.close();
}

}

@NamLe: Dies bringt die Anwendung zum Absturz und zeigt dies im LogCat an, wenn onCreate() aufgerufen wird.

02-23 13:19:43.540: I/System.out(11667): Sun Jun 24 00:00:00 MDT 2012 02-23 13:19:44.500: W/dalvikvm(11667): threadid=11: thread exiting with uncaught exception (group=0x40a351f8) 02-23 13:19:44.510: E/AndroidRuntime(11667): FATAL EXCEPTION: Timer-0 02-23 13:19:44.510: E/AndroidRuntime(11667): android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views. 02-23 13:19:44.510: E/AndroidRuntime(11667): at android.view.ViewRootImpl.checkThread(ViewRootImpl.java:4039) 02-23 13:19:44.510: E/AndroidRuntime(11667): at android.view.ViewRootImpl.requestLayout(ViewRootImpl.java:709) 02-23 13:19:44.510: E/AndroidRuntime(11667): at android.view.View.requestLayout(View.java:12675) 02-23 13:19:44.510: E/AndroidRuntime(11667): at android.view.View.requestLayout(View.java:12675) 02-23 13:19:44.510: E/AndroidRuntime(11667): at android.view.View.requestLayout(View.java:12675) 02-23 13:19:44.510: E/AndroidRuntime(11667): at android.view.View.requestLayout(View.java:12675) 02-23 13:19:44.510: E/AndroidRuntime(11667): at android.view.View.requestLayout(View.java:12675) 02-23 13:19:44.510: E/AndroidRuntime(11667): at android.widget.TextView.checkForRelayout(TextView.java:6773) 02-23 13:19:44.510: E/AndroidRuntime(11667): at android.widget.TextView.setText(TextView.java:3306) 02-23 13:19:44.510: E/AndroidRuntime(11667): at android.widget.TextView.setText(TextView.java:3162) 02-23 13:19:44.510: E/AndroidRuntime(11667): at android.widget.TextView.setText(TextView.java:3137) 02-23 13:19:44.510: E/AndroidRuntime(11667): at com.pixelcrunch.crunchtime.TheCount$1.run(TheCount.java:87) 02-23 13:19:44.510: E/AndroidRuntime(11667): at java.util.Timer$TimerImpl.run(Timer.java:284)

Gefragt el 23 de Februar, 2012 von Sean Croft

Antworten

Zu viele Anzeigen?

27voto

NamLe avatar
NamLe Punkte 570

Versuchen Sie zu verwenden UpdateDisplay Funktion wie unten:

private void updateDisplay() {
    Timer timer = new Timer();
    timer.schedule(new TimerTask() {

        @Override
        public void run() {
            Calendar c = Calendar.getInstance();
            mYear = c.get(Calendar.YEAR);
            mMonth = c.get(Calendar.MONTH);
            mDay = c.get(Calendar.DAY_OF_MONTH);
            mHour = c.get(Calendar.HOUR_OF_DAY);
            mMinute = c.get(Calendar.MINUTE);
            mSecond = c.get(Calendar.SECOND);

            cDateDisplay.setText(new StringBuilder()
                // Month is 0 based so add 1
                .append(mDay).append("/")
                .append(mMonth + 1).append("/")
                .append(mYear).append(" "));

            cTimeDisplay.setText(
                new StringBuilder()
                    .append(pad(mHour)).append(":")
                    .append(pad(mMinute)).append(":").append(pad(mSecond))
            );
        }

    },0,1000);//Update text every second
}

Schließlich müssen Sie die updateDisplay() in onCreate() Funktion.
Ich hoffe, dass dieser Code Ihnen helfen wird, das zu erreichen, was Sie wollen!

Beantwortet el 23 de Februar, 2012 von NamLe (570 Punkte )

4voto

Alecs avatar
Alecs Punkte 2804

Um es auf dem Hauptthread laufen zu lassen:

        new Timer().schedule(new TimerTask() {
        @Override
        public void run() {
            runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    yourMethodOnTheMainThread();
                }
            });
        }
    },0,10000);
Beantwortet el 9 de Januar, 2017 von Alecs (2804 Punkte )

0voto

dragonx avatar
dragonx Punkte 14817

Sie können entweder sendMessageAtTime() o postAtTime() um sich selbst eine Nachricht in einer Sekunde in der Zukunft zu schicken, und sie dann zu bearbeiten.

Für weitere Informationen.

Beantwortet el 23 de Februar, 2012 von dragonx (14817 Punkte )

0voto

Kurosawa Hiroyuki avatar
Kurosawa Hiroyuki Punkte 1167

Vielleicht können Sie auch Timer/TimerTask verwenden, um einen Vorgang wiederholt auszulösen: https://developer.Android.com/reference/java/util/Timer.html

Beantwortet el 23 de Februar, 2012 von Kurosawa Hiroyuki (1167 Punkte )

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